| Haugmann AS | Financial services | 2007 |
| Hauken Invest AS | Professional & scientific | 2005 |
| Hedda Rådgivning AS | Administrative & support | 2012 |
| Heim Bygg Og Montasje AS | Construction | 2023 |
| Heimdal Butikkinvest AS | Wholesale & retail | 2018 |
| Heliad Holding AS | | 2025 |
| Helvetica AS | Financial services | 2015 |
| Henrik Grimsmo AS | Real estate | 2026 |
| Hermann Nielsen AS | Transport & logistics | 2019 |
| Herrmann Digital AS | Information & communication | 2024 |
| Herrmann Holding AS | Information & communication | 2024 |
| Hessedal Consulting AS | Professional & scientific | 2024 |
| Hestnes Holding AS | | 2005 |
| Hiot AS | Information & communication | 2023 |
| Hjellan AS | | 2026 |
| Hmpg Invest AS | Real estate | 2007 |
| Hoffaride AS | | 2023 |
| Holmberget Invest AS | Real estate | 2005 |
| Horgis AS | | 2025 |
| Hsgl Eiendom AS | Real estate | 2021 |
| Humstad Eiendom AS | | 2026 |
| Husværet AS | Real estate | 2016 |
| Hyllfoto AS | Professional & scientific | 2024 |
| Håkon Solberg Holding AS | | 2026 |
| Høvik Invest AS | Professional & scientific | 2025 |
| I9 Holding AS | Financial services | 2017 |
| Idemix Vending AS | Administrative & support | 2024 |
| Ig Consult AS | Professional & scientific | 2017 |
| Ik Stene AS | | 2021 |
| Ildra AS | | 2025 |
| Ilevollen 48 AS | Real estate | 2018 |
| Ilevollen Eiendom AS | Real estate | 2012 |
| Incras Brands AS | Wholesale & retail | 2023 |
| Indpro AS | Professional & scientific | 2018 |
| Infinitus AS | Financial services | 2017 |
| Inn Holding AS | | 2025 |
| Innsikt Boligtakst AS | Professional & scientific | 2025 |
| Inova Management AS | Professional & scientific | 1994 |
| Int 351 Holding AS | | 2023 |
| Intro Holding AS | Professional & scientific | 2017 |
| Investor AS | | 1990 |
| Isefa AS | | 2022 |
| Iway Group AS | Manufacturing | 2025 |
| Jakobsli Hårstudio Ans | Other services | 1989 |
| Jan T. Thomassen Holding AS | Real estate | 2005 |
| Jarle Holding AS | Professional & scientific | 2005 |
| Jas AS | Professional & scientific | 2023 |
| Jasso AS | Financial services | 2006 |
| Jc-Invest AS | Professional & scientific | 2012 |
| Jebra Eiendom AS | Real estate | 2020 |
| Jebra Nord AS | Real estate | 2020 |
| Jebra Næring AS | Real estate | 2026 |
| Jebra Sør AS | Real estate | 2020 |
| Jebra Øst AS | Real estate | 2020 |
| Jenssen & Co AS | Real estate | 1962 |
| Jenssen Holding AS | Manufacturing | 1984 |
| Jeraymi AS | | 2022 |
| JK Holding AS | | 2005 |
| Jon Skogstads Veg 10 AS | Real estate | 2021 |
| Jonas H Holding AS | Wholesale & retail | 2025 |
| Jovini AS | Financial services | 2011 |
| Jtjo AS | Financial services | 2017 |
| Jtjo Eiendom AS | | 2018 |
| Julia Bratvold Nervik AS | Wholesale & retail | 2022 |
| Jusstips AS | | 2024 |
| Jävlar På Kärlek AS | Arts & recreation | 2013 |
| Jøldalen Invest AS | | 2020 |
| K & P Eiendom AS | | 2017 |
| K-Larsen Holding AS | | 2022 |
| K. Sandvik Taxi AS | Transport & logistics | 2017 |
| Kafo Utvikling AS | Professional & scientific | 2003 |
| Karlgård Holding AS | | 2025 |
| Kasomo Aqua AS | Agriculture & fishing | 2025 |
| Kasomo Elektro AS | Construction | 2019 |
| Kasomo Energy AS | Professional & scientific | 2022 |
| Kasomo Group AS | Professional & scientific | 2018 |
| Kasomo Invest AS | Real estate | 2019 |
| Kasomo Services AS | Professional & scientific | 2023 |
| Keh Holding AS | Construction | 2005 |
| Kehe Holding AS | Financial services | 2014 |
| Kenneth Sandvik Taxi AS | Transport & logistics | 2019 |
| Ketoi AS | Professional & scientific | 2019 |
| Ki Sport Media Invest AS | Professional & scientific | 2020 |
| Kilås Holding AS | | 2026 |
| Kilås Labs AS | Information & communication | 2026 |
| Kimni Offshore AS | Professional & scientific | 2023 |
| Kirkbak Holding AS | Professional & scientific | 2010 |
| Kiropraktor Andreas Kolsvik AS | Health & social care | 2012 |
| Kiropraktor Trine Jakobsen AS | Health & social care | 2013 |
| Kjell Evensen AS | Financial services | 2005 |
| Kju Invest AS | | 2017 |
| Kjøpmannsgata 11 Trondheim AS | Real estate | 2022 |
| Klart Du Kan Trafikkskole AS | Education | 2017 |
| Klepp & Webb AS | Wholesale & retail | 2026 |
| Klinikk Veronika AS | Health & social care | 2017 |
| Klostergata 8 AS | Real estate | 2018 |
| Klostergt. 34 B AS | Real estate | 2020 |
| Klungerbo AS | Real estate | 2020 |
| Klättermusen Norge AS | Wholesale & retail | 2010 |
| Kno AS | Professional & scientific | 2023 |